This toy is a challenging foraging device and noise making toy all in one. When your bird tilts and turns the toy the marbles inside the inner rings makes a fun noise for him to enjoy. The outer rings are where you place your birds favorite treat or pellet and he will have to tilt the wheel just right to release the treat out of the small holes and retrieve his reward. Toy is made of durable polycarbonate and dishwasher safe. Includes stainless steel mounting hardware and easily attaches to any cage.